Extension builder estimates (based on hourly rates) to build a single storey extension in KW12
Range from the cheapest single storey extension £74000 (TEST Kavita1 based in KW1) to the dearest single storey extension £74000 (TEST Kavita1 based in KW1).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in KW12 by posting a job with HaMuch and we will send it to extension builders in KW12.
Estimates for common extension builder jobs in KW12;
| Job | Estimate |
| Underpinning a house | £18700 |
| Build a two storey extension | £89800 |
| Build a timber frame extension | £27200 |
| Install a swimming pool | £82200 |
| Cost to build a single storey extension | £74000 |
| Cost to build a side return extension | £51000 |
| Install an RSJ | £3400 |
| Build an outbuilding | £11200 |
| Build a mansard loft conversion | £53200 |
| Cost of a loft conversion | £45000 |
| Build a kitchen extension | £43200 |
| Build a hip to gable loft conversion | £43200 |
| Build a granny annexe | £88200 |
| Build a garden office | £11200 |
| Convert a garage | £17200 |
| Build a new garage | £19700 |
| Build a flat roof extension | £23200 |
| Build a dormer loft conversion | £43200 |
| Lay a concrete foundation | £7450 |
| Convert a bungalow loft | £30200 |
| Basement conversion cost | £51000 |
Rates for other KW12 trades
Extension Builders in KW12
| Business name | Single storey extension cost |
|---|---|
| TEST Kavita1, abx, KW1 | £74000 |